The Democrats, for all their railing against "plutocrats" and "Big Business", actually hate small business far more. People who own their own businesses and don't have big legal departments to deal with regulations, or who work in small businesses and work closely enough with the owner to know what's good and bad for the business, are an irreducible supply of opposition to all their economic schemes.
Big Business (unless the owners happen to be libertarian ideologues -- Koch Industries being the sole example of that which springs to mind) is happy to be coopted with goodies from the government, cheerfully accepts intrusive regulation because they can handle it while their small business competitors are crushed by it. Actual plutocrats are willing to buy indulgences by donating to LGBTQWERTY causes, buying carbon offsets and the like, while small business don't have the margin to spend money kow-towing to the mandarins of multiculturalism, polymorphic perversity and anti-human ecologism.